If he fills 5.9 bags for 18 hours, he will have filled a total of 106.2 bags
5 feet is 5*12=60 inches. Therefore, our ratio is 28:60. Dividing both terms by 4, we see that the most simple ratio is 7:15.
You can't write expanded form in three ways, but you can write that number in expanded form AND two other ways, one you just listed.
Word: thirty seven thousand, nine hundred seventeen thousand, five hundred forty five
Expanded: 30,000,000 + 7,000,000 + 900,000, 10,000 + 7,000 + 500 + 40 + 5
Standard: 37,917,545